The difference between cystic fibrosis and migraine is that the
A) former is caused by various environmental factors.
B) former can be traced to a single gene.
C) former is caused by the absence of a chromosome.
D) latter is a Mendelian trait.
B) former can be traced to a single gene.
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Which of the following statements about gametogenesis is correct (select all correct choices)?
A. In human males, spermatogenesis begins at puberty. B. In human females, primary oocytes form during puberty. C. In human females, the egg that is released during ovulation is a primary oocyte. D. In human females, a secondary oocyte arrests in metaphase II. E. In human males, spermatogenesis results in one full-sized sperm and three polar bodies.
Which of the following has NOT been observed as a trait of sperm competition?
A) applying pheromones that reduce the female's attractiveness B) the production of large ejaculates containing many sperm C) depositing a copulatory plug D) prolonged copulation during mating E) All of the above have been observed as traits of sperm competition.
Capsular
What will be an ideal response?
True or false? The integumentary system consists of three layers. From outermost to innermost, they are made of epithelium, dense connective tissue, and loose connective tissue
True False